It is narrated from Sayyiduna Khuzaymah bin Thabit (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said concerning wiping over leather socks: "For the resident, one day and one night; and for the traveller, three days and three nights."
Hadith Referenceالمعجم الكبير للطبراني / باب الخاء / 3773